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  1. #16
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    Loch Erin, Irish Hills Area, SE Michigan
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    Take the pump apart, then replace the old diaphragm and gaskets.
    '89 Hydrostream Vegas XT, '90 Merc 2.4 Bridgeport PCU EFI
    My YouTube videos________My Flickr photo gallery
    http://www.facebook.com/profile.php?id=1706097519

  2. #17
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    its hard to say

    since you aint there but it sounds like a fuel issue to me Too i just today rebuilt a square fuel pump kit was 6.47 . but if i was making a guess i would say its the carbs aint clean 150 is right there is a lot of small holes and places that are hard to get to, they got to be torn completely down to get it all out
    Last edited by TEXAS20225; 01-13-2010 at 07:46 PM.

  3. #18
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    The full strenght decarb will go a long way in cleaning out the carbs. If there's a hole in the fuel pump diaphram you won't be pumping adequate fuel and you'll be pumping air into the fuel from the pulse port.

    There are two check valves in the fuel pump that need to be changed also. They can be a little tricky if you just go at it so read the instructions. I use a finish nail to set them retaining pins.

    Fuel pump is a good idea and a real carb cleaning with a 24 hours soak in gunk followed by a wash with a citrus based cleaner and a final blow down with compressed air is the routine. Have a good overhead light source and look closely at all those tiny holes in the throats. Brush them with a nylon brush until they're clear and you can see unobstructed light through them. Soak the jets too but keep them separated. I put down a piece of paper with some strips of double sided tape on it and stick them to it. The ones that are exactly the same can be soaked together but separate the others and keep track of where they came from so you can put them back exactly as your found them.

    Set the floats according to spec's in the manual James is gonna send you. Don't backyard it, that's for when you don't have time to clean them properly and, by the way, it doesn't work.

    You've got a ton of fantastic advice so you should have that thing up and running in no time.

    Steve

  4. #19
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    Bad spark on 2

    Well, I pulled the fuel pump and it looks fine. Then I checked the spark on all 6. They're all jumping over 1/2" except one of them. Number 2 is weak and intermittent. I checked the wire on a different coil and it's not the wire. On another note, the buzzer went off on this last run and I noticed the cooling water wasn't squirting out the outlet at the top of the engine. It was squirting just fine earlier today. There was plenty of water flowing at the hookup so I don't think that's it. This thing has a new impeller so I don't think that's the problem either.

  5. #20
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    If you're running high rpm on the hose, the water pump will starve for water as the hose can't flow enough. Just a thought.
    1995 Allison XB-2003, 225 Promax
    2002 Trans Am, pulls the boat fine.

  6. #21
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    Quote Originally Posted by silverbullet02 View Post
    If you're running high rpm on the hose, the water pump will starve for water as the hose can't flow enough. Just a thought.
    I didn't take it out of idle this time.

  7. #22
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    Quote Originally Posted by sschefer View Post
    There are two check valves in the fuel pump that need to be changed also. They can be a little tricky if you just go at it so read the instructions. I use a finish nail to set them retaining pins.


    Steve
    His is a TOTALLY different pump being a 82 from yours and Bobby's.
    James Perry

  8. #23
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    oh yeah he has the oblong one

    i did not think about the older style but according to his intermittent spark that sounds like a switch box or trigger maybe

  9. #24
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    make sure to remove those spark advance modules

  10. #25
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    Quote Originally Posted by wrechin2 View Post
    His is a TOTALLY different pump being a 82 from yours and Bobby's.
    Oh yeah, your right I forgot. Sorry about that.

  11. #26
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    Quote Originally Posted by TEXAS20225 View Post
    i did not think about the older style but according to his intermittent spark that sounds like a switch box or trigger maybe
    That's certainly a possibility. I'd like to see what the seafoam decarb does first.

  12. #27
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    if you have intermintant spark... or WEAK spark... STOP.. get a DVA adaptor for your DVOM .. ( you do own a digi volt meter right.... ) and track the weak spark.... swappin wires on OB wont tell you a darn thing because unlike Automotive wires that are carbon/graphite based and high reisitance... the wires used on OB motors are of solid core IE all metal and at 45000-60000 volts arent going to show the deects a standard wire might... swap coils around... if it moves its a bad coil... if it stays weak on same hole its a switch box or trigger.


    but carbs and pump NEED to be properly addressed



    and finally.. i hate to say it.. but if you were sustaining 6K on the hose, your impeller is SHOT and will require both impeller and housing due to exhaust and friction heat damage.

    i can get you a complete WP kit for under 35.00
    Last edited by 150aintenuff; 01-14-2010 at 03:36 AM.

    4-16-2014. 25 years old today... the fishin boat doesnt look to bad for a classic does she


    things that were are no longer as they are today...

  13. #28
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    PM'd you a link to the manual. IF you find any mistakes, let me know so I can correct them. Thanks.
    James Perry

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